Header image
Enter a name
Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York
Blue-winged Olives
Baetis

Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.

Dorsal view of a Ephemerella mucronata (Ephemerellidae) Mayfly Nymph from the Yakima River in Washington
This is an interesting one. Following the keys in Merritt R.W., Cummins, K.W., and Berg, M.B. (2019) and Jacobus et al. (2014), it keys clearly to Ephemerella. Jacobus et al provide a key to species, but some of the characteristics are tricky to interpret without illustrations. If I didn't make any mistakes, this one keys to Ephemerella mucronata, which has not previously been reported any closer to here than Montana and Alberta. The main character seems to fit well: "Abdominal terga with prominent, paired, subparallel, spiculate ridges." Several illustrations or descriptions of this holarctic species from the US and Europe seem to match, including the body length, tarsal claws and denticles, labial palp, and gill shapes. These sources include including Richard Allen's original description of this species in North America under the now-defunct name E. moffatae in Allen RK (1977) and the figures in this description of the species in Italy.
27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.
Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Landscape & scenery photos from Clearwater Mountains

Beginning of Alpine Creek

From Clearwater Mountains in Alaska
Wild geranium. I'm not sure how to tell which species this is within the genus Geranium, but Geranium erianthum is common in Alaska, so that may be it.

From Clearwater Mountains in Alaska
Beautiful mountain valley where I got my caribou in 2012.

From Clearwater Mountains in Alaska
Bull caribou walking away

From Clearwater Mountains in Alaska
Where are chest waders when you need them?

From Clearwater Mountains in Alaska
Crossing a tributary of Windy Creek. My waterproof leather boots & Kuiu gaiters kept my feet dry here, but I had less luck in the thigh-deep holes of whitewater in rain-swollen Windy Creek itself a couple hours later.

From Clearwater Mountains in Alaska
Beginning of Alpine Creek. Alpine Creek starts at the lake outlet in the bottom of this picture.

From Clearwater Mountains in Alaska
Denali Highway back in view after hiking 19 miles.

From Clearwater Mountains in Alaska
South Fork Pass Creek valley panorama

From Clearwater Mountains in Alaska
Looking up toward the pass we had to go through to start our second day hiking.

From Clearwater Mountains in Alaska
Carrying a heavy load.

From Clearwater Mountains in Alaska
Panoramic view of the mile-wide shoulder of a tundra ridge with a little valley in the middle.

From Clearwater Mountains in Alaska

References

Troutnut.com is copyright © 2004-2024 (email Jason). privacy policy